Seishin katsuryoku

Seishin katsuryoku (Seishin katsuryoku 精神活力, Literally "Mental vitality") are the unique abilities that are possessed by nearly every character within the Kaze Jōtei universe.

About Seishin Katsuryoku
Almost each character possess a Seishin katsuryoku which is different from the other. One Seishin katsuryoku is not simply stronger than the other, when it comes to who has a stronger katsuryoku it really depends on how well they are capable of using it.

Training
Seishin Katsuryoku training consists of both intense physical and mental training and can take up to 4 months to gain complete control.